Diveen Henry’s excellent performance boils up from sullen insularity to aggressive anger which clearly intimidates Marianne Oldham’s One, desperately trying not to break protocol and show feeling. Sid Sagar as her eager colleague is blissfully unaware of a propensity to put his foot in it.

The sheer inhumanity of this future vision comes shockingly to life when Two enthusiastically lays out the execution options from which Three takes her pick. While hang explores justice and retribution it is as much about uncaring bureaucracy with its petty rules which have a grim hilarity. Ian Soutar